Pipe-coupling.



D. J. W. MURDOOK'.

PIPE COUPLING. v union-1011' 11.51) 111112. 19, 1912;

1,048,855. Patented 31, 1912.

Fig] 1 UN TE AT S FF G nan-Ins J. w. MURDOQK, 0F wA rEnviLLE, ASHIN TO PIPE-COUPLING;

Spectfication'of tenets-Patent. Patented Bet. 31, 1'91 2.. Application filed June 19, 1912. Serial No. 1o4,5s3.

To all whom it may concern Be it known that I. Dames J. \V. Munnocn. a citizen of the United States, residing Couplings, of which the following is a full,

clear, and exact specification.

This invention relates to .pipe couplings and has for object the provision of simple and inexpensive construction whereby the meeting ends of ad oining pipe sections may beifirmly secured together and will. be

permittedto expand, or contract when subjected to a high temperature'or other influence, without admitting 'air or *water through the joint-to the pipe.

The invention also seeks to assembling of the pipe seetions and other panying drawings, in which.

Figure 1 is an elevation of one form of the coupling; Fig. 2 is a longitudinal section of the same; Fig. 3 is an elevation of another form of the coupling; Fig. 4,is a longitudinal section 'of the same.

' Referring to the drawings,- the meeting ends of the pipe sections are designated 1 and 2, the section 1 being hereinafter termed .the female section and. the section 2 being termed the male section.- The-male'seetion' is provided with one or more annular external beads 3 but is other wise cylindrical. The

, female section .is constructed adjacent its end with internal annular beads 4, external grooves being thereby formed in the female section and internal grooves being formed in the male section. U on the female see tion, near, (but somewhat removed from) the end of the same,-is a collar .or ring 5 which is ri id with the pipe. section but is offset there mm, as shown at 6, whereby a. space is providedbetween the collar and the pipe section 1 to receive-the end of the male section 2. A packing of any suitable material indicated at 7 is placed in one'or more.

of the external grooves in the female section and the end ofthc male section is then slipped over the same and into the collar,

mclten lead or similar expansible material,

8, being then placed in the collar so as to fill the space therein not occupied by male section. The free edge of the collar is flared as shown at 9, so as to be readily facilitate the erwise rigidly secured thereon.

asif the sections should be slightly outof alinel'nent'. the flared formation of the-collar will guide them into alinemert. "As the male section passes into the assembled position, it will compress the packing 7- so that leakage between the sections will be pix-- rented and the packing S will efiectmilly prevent leakage between the collar and the male section. The beads formed in the secticns serve to reinforce them and at the same tune permit them to expand and contract without. beeomlng separated. The parking 8 will preferably beof lead or some other material which is impervious to air and moisture and responds readily to variations in temperature so that the space around the end of the outer seetionjwill be completely sealed under all conditions.

The collar may be made integral with the pipe section as by being cast therewith or it may be made separate and brazed or oth- In Figs. 1 and 2 I have shown the collar asa separate pipe. In Figs. 3 and 4 I have shown a'eonstruct-ion which may be advantageously employed in sheetmetal pipes. In this form the female member 1 has its end doubled at 13, and extended toward the extremity of the section to form the collar which receives the end of the male section 9.. These folds 'Will be most mnveniently made beforethe ,sheet is rolled to form the pipe.

struction is inexpensive and permits the finished article to be produced very expeditiously. a

Having thus fully described my invention what I claimas new and desire to secure by Letters Patent is 1-- 1. A pipe coupling comprisii'ig overlap. ping pipe sections, the inner section hav ng its end doubled on itself to form superposed plies and then folded outward to form a collar spacedv from and surrounding the outer ply and the outer pipe section, said superposed plies having inter-fitting externalgrooves, packingarranged in the groove of theouter ply and compressed by the outer. section, and packing in the collar scaling the outer pipe sect-ion.

:so i

The con- "2.. A pipe coupling comprising overlap section.

In testimony whereof I have signed niy 4 name to thisspeclfication in the presence-of 10 two subscribing witnesses.

DARIUS J. W; MURDOCK.

Witnesses: I

ARTHUR MCGUIRE, M. J. SHEERAN.

ping pipe sections, a collar on said inner sci-lion surrounding the outer section, packing ins-aid collar sealing theouter pipe section, the inner pipe section having an exlcriml annular groove arranged beyond the outer edge of said collar, and packing in said groove 'con'i'pressed by the outer pipe 

